Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
hanh hai » thanh hai, nhanh hai, hang hai
cau treo » cau theo, cau tren, cau triet
xuc van » duc van, luc van, vuc van
hai cau » hai chau, hai chu, hai hau
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
nang o » nang co, nang ho, nang ro
ve cac » va cac
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky nang o hoi. hieu ((ve cac) OR (vien cac)) xuc van hanh hai cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang o hoi. hieu ((ve cac) OR (vien cac)) xuc van hanh hai cau treo".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang o hoi. hieu ((ve cac) OR (vien cac)) xuc van hanh hai cau treo*.